A Differential Correction Method of Line Array Image Based on Fast Positioning of Optimal Scanning Line

Abstract

The invention relates to a linear array image differential rectification method based on optimal scanning line rapid positioning. In a rapid positioning process, the arrangement loci of scanning line linear array CCD picture elements of a series of linear array images are acquired at first, and then segmentation fitting is carried out on the arrangement locus of every scanning line linear array CCD picture element with a line segment as an approximation element; object space elevation is given and a segment projection surface in object space is constructed by using ground point line segments corresponding to every fitting line segment and corresponding scanning line projection centers; a ground point is given, and every corresponding segment projection surface of the ground point is determined; scanning lines corresponding to a corresponding segment projection surface closest to the ground point are searched; and interpolation of an optimal scanning line is accurately carried out by using obtained scanning lines. The method provided by the invention can accurately position the optimal scanning line, has linear array image processing efficiency 8 times higher than that of a searching method based on image space, enables a linear array image differential rectification speed to be increased by more than 6 times and has high practicality.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image processing, and relates to a linear array image differential correction method based on fast positioning of an optimal scanning line. Background technique [0002] The line array sensor is the main means of remote sensing image acquisition. In the aviation field, the line scan camera represented by ADS40 has been successfully applied to various scales for aerial surveying and mapping. In the aerospace field, SPOT5, IKONOS, QuickBird, WorldView, GeoEye, Pleiades, and my country's Tianhui and Ziyuan No. 3 high-resolution satellites are all linear array sensors. At present, deep space exploration is also a research hotspot in various aerospace countries. European and American countries have conducted multiple surveys and mappings of the moon and Mars terrain. my country has successfully launched Chang'e-1 and Chang'e-2 satellites, and deep-space surveying and mapping cameras also mostly...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a linear array image differential correction method based on the optimal scanning line fast positioning to solve the problem of low efficiency and low practicality in processing a large number of linear array images

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